How to Crop Images in OpenCV Using NumPy Slicing?

Image Cropping in OpenCV with Python

To crop images in OpenCV, unlike with PIL, you can use NumPy slicing. Here's how:

1. Load the image:

import cv2
img = cv2.imread("image.jpg")

2. Define the crop parameters:

• x: Starting column
• y: Starting row
• w: Width of the crop
• h: Height of the crop

3. Crop the image using NumPy slicing:

crop_img = img[y:y+h, x:x+w]

4. Display the cropped image:

cv2.imshow("Cropped Image", crop_img)
cv2.waitKey(0)

Incorrect Usage of getRectSubPix

In your attempt, getRectSubPix was incorrectly used. This function is meant for drawing rectangles on an image and not cropping it.

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